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In Reply to: RE: 6AH4GT Prototype DC Amp says "hello", in progress work posted by deathtube 667 on October 15, 2014 at 17:40:55
DT,
Edison Price posts are no longer available, the best sounding part of this type. Can use Cardas today, not as good, at a high cost.
Salectric, perhaps the world's ultimate parts critiquer and tweaker, tells me, his favorite is to use the Cardas post, not to put the signal through, but to hold two ring ( or fork ) terminals together, one on another, tightly screwed down to each other.
In that case, why run a long secondary wire under the chassis and pass the entire signal THROUGH a Cardas post??
Why not keep the secondary leads short, always a positive with a SE amp, and terminate to a good terminal block !???
I am real picky about absolute phase, despite what a few may THINK, and so, this arrangement is "right there" on the top of the chassis, with plenty of room for me to unambiguously swap speaker leads to get to hear it correctly as far as being in absolute pahse.
I like this arrangement in theory. It is the first time I am trying it out in practice. I will use XLO brand 1/4 inch fork jacks ( Percy ) as speaker terminations, and a 3/8ths inch socket wrench, to swap phase on speaker leads. Terminals are 10-32nds, 3/4 inch spaced, and I will use 10-32nds brass nuts.
Why not ???
Jeff Medwin
Follow Ups:
Thanks for the info about the wire upgrade for Altec.
Ordered some this afternoon. Avoided any dark colored wire jackets.
Steve said it would be a major upgrade over my current wires.
If DF likes this wire, I think it will be pretty good on the 811Bees.
Are the OPTs with a single silver secondary or multi tapped?
Hi GEO,Will have to check, sourced from Lowes, Electrical Department, look for
door bell transformers, and best of all ( makes the amp ) they are single tap output transformers.Hey, it doesn't matter much when all else is good and on the money, honey.
Got the AC cord, fuse, and thermistor in this afternoon. Soon !!
Jeff
Edits: 10/16/14
Lowes is fine. Make sure the opts are covered with the new quantum stealth material. The amp will really disappear. With the black components I mentioned, you will have an invisible amp with the sound emerging from blackness!
Edits: 10/16/14 10/17/14
Jeff , I can see the problem here is that you just can't THINK out of the box . This muddy thinking , I feel , will seriously be affecting your MUSICAL enjoyment .
Cardas posts are very poor signal carriers as are the Edison Price posts which you recommend . If you want to put a musical signal THROUGH either of these : THINK AGAIN ! These binding posts are manufactured from brass which due to it's own chemical composition is a poor electron carrier , even when plated with Rhodium , gold or silver . The electron cloud that forms inside all metals when passing electrons , inside brass forms a barrier which acts as a moderator , limiting the flow of electrons . What you are left with is an ohmic result of the skin effect which exists due to the plating used . You could say the electrons are slowed down within the metal , they tend to also lose synchronicity causing timing errors within the musical signal . To avoid this , I would strongly recommend silver . Furutech solid silver outboard posts are now available from Michael Percy , these must be wired to your output transformers with 10AWG Siltech wire using the BEST solid silver solder you can afford . Wonder solder just does not cut it here ! Never have a binding post that passes through the chassis with insulators . This will form a magnetic field causing a shorted turn which will BUCK OUT the musical signal . If you build with anything else then you are building PURE shit which should never be powered on . Don't say you haven't been warned...
Al
Al, thanks for this warning! On your advice I will stop using brass as a conductor. I only hope your advice doesn't fall on deaf ears.
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